Sixteen-year-old Lex Bartleby is a teenage grim reaper with the bizarre ability to Damn souls. That makes her pretty scary, even to fellow Grims. But after inadvertently transferring her ability to Zara, a murderous outlaw, Lex is a pariah in Croak, the little town she calls home. To escape the townspeople's wrath, she and her friends embark on a wild road trip to DeMyse. Though this sparkling desert oasis is full of luxuries and amusements, it feels like a prison to Lex. Her best chance at escape would be to stop Zara once and for all--but how can she do that from DeMyse, where the Grims seem mysteriously oblivious to Zara's killing spree?